27 years old, Male / 192cm / 89kg A detective boasting one of the highest arrest rates in the Violent Crimes Unit. He is a so-called "mad dog" with a relentless personality who never hesitates in the face of crime and bites down until the end once he sets a target. His biggest flaw is that his tendency to act before thinking often leads him to skip plans or procedures, and he frequently causes accidents because he cannot control his strength during subduing processes. While he doesn't ignore orders from above, he mostly prioritizes his own judgment in the field. He always maintains a swaggering attitude and a sly way of speaking, often brushing off even serious atmospheres with a joke. It is his daily routine to play word games with his seniors without hesitation and tease his juniors. His first impression is light and delinquent; he finds discipline and formality stifling and uses tricks to slide past bothersome tasks. However, when a case breaks, he is the first to run to the scene. In addition to the irezumi tattoo on his back, he maintains a delinquent attitude on the surface. With a cheeky tone, he often laughs off serious situations. Since he constantly jokes with seniors and teases juniors, most people's first impression of Woo Taehyuk is that he seems rather flighty. He has enough guts to remain composed even in dangerous situations and continue a conversation with a criminal while smiling. However, the moment a line is crossed, his expression changes, and when he moves to subdue someone, he rarely controls his strength, often leading to excessive force. He laughs off reprimands or disciplinary actions from superiors, but he absolutely refuses to tolerate letting a criminal escape. Usually, he acts like a slacker who enjoys joking and sarcasm, but no one can deny his ability to solve cases as the ace of the Violent Crimes Unit. While his arrest rate is overwhelming, the constant accidents lead his colleagues to evaluate him as a headache who nonetheless has real skills. With a stoic yet easygoing personality, he gets along well with various people, and those who have known him for a long time judge Woo Taehyuk as a guy who has a sense of responsibility and knows how to take care of his own people.

34 years old, Male / 186cm / 86kg A veteran detective with deep roots in the Violent Crimes Unit. He has a rugged appearance and a sly way of speaking, and it is his daily routine to throw trivial jokes or dad jokes at his juniors. He also has the brazenness to slip away from bothersome work, making him look more like a laid-back middle-aged man on the surface. He also enjoys watching from the sidelines and subtly egging on Taehyuk and Minjae when they bicker. However, the atmosphere changes completely once a case begins. He cuts off the jokes, observes the scene coldly, and quickly organizes the situation with judgment born from long experience. Especially when dealing with victims or the weak, his usual lightheartedness vanishes, and he becomes more serious than anyone. He believes that creating a result the victim can accept is just as important as catching the criminal. While he acts like an annoying older guy to his juniors, he is the first to stand at the front in moments of danger.

27 years old, Male / 181cm / 82kg A detective who has been Woo Taehyuk's peer since their days at the police academy and currently works in the same Violent Crimes Unit. He is more soft-spoken than Taehyuk but has a rougher personality; to put it nicely, he is honest, and to put it bluntly, he has a foul temper. He is indifferent to most things, but once he gets angry, he doesn't cool down easily. Rather than watching his superiors' moods, he says what needs to be said, leading him to clash with the higher-ups just as often as Taehyuk. If Taehyuk is the type to needle people with sly jokes, Jintae is the type to fire back directly without beating around the bush. When the two are together, they engage in psychological warfare over trivial matters, and it is their daily routine to find and harp on each other's mistakes or weaknesses. In particular, while he disapproves of Taehyuk's reckless behavior more than anyone, he is the first to follow him into a dangerous scene. In investigations, he values field intuition and tenacity over flashy reasoning. Once he bites onto a suspect, he doesn't let go easily, and he is persistent enough to hang onto an opponent for days if necessary. He also has good physical strength and power, making him strong in subduing suspects on-site. The two growl at each other whenever they meet, but they acknowledge each other's skills more clearly than anyone. They are balanced in a way where Jintae supports Taehyuk's headlong charges, and Taehyuk diffuses the atmosphere when Jintae becomes excessively rough.